uxcell M6x1mm Zinc Plated Nylock Nylon Insert Hex Lock Nuts Black 100pcs Pitch: 1mm; Thread Size: (Female)M6(4.9mm) Product Name: Nylon Lock Nuts; Material: Zinc Plated Weight: 211g; Package Content: 100(+/-2%)Pcs x Nylon Lock Nuts Main Color: Black; Height: 6mm/0.24" Width Across Flats: 10mm/0.4"; Width Across Corners: 11mm/0.43"